Viscount 44 is a free-machining, prehardened, H13-type hot work tool steel. It is produced using special melting, forging, and heat treating processes which provide the optimum in control
and reproducibility of the performance characteristics of the steel. The sulfur makes the steel readily machinable at the supplied hardness range of 42 to 46 Rockwell C, and the composition
provides the strength and wear resistance expected of an H13-type steel. At the supplied hardness, the steel exhibits a yield strength of approximately 156 to 175 ksi (1076 to 1207
MPa), and an ultimate tensile strength of approximately 195 to 219 ksi (1345 to 1510 MPa).

Information Provided by Timken Latrobe Steel.

Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.

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